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表示主体的检索词有标题词、单元词、()、( )
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【简答题】遥想公瑾当年, , 。 , 、 。
【简答题】遥想公瑾当年, 。
【单选题】某物质的摩尔吸光系数很大,则表明
A.
该物质溶液的浓度很大
B.
光通过该物质溶液的光程长
C.
该物质对某波长的光的吸收能力很强
D.
用紫外—可见分光光度法测定该物质时其检出下限很高
【单选题】三,选择 1, It ______ three months _______ I last saw him. A was since B have been after C has been since D is for 2, Where _____ John? In the library. He _____ there for an hour. A has been, has go...
A.
was since
B.
have been after
C.
has been since
D.
is for
【简答题】苏轼赤壁赋中有一段‘遥想公瑾当年，小乔初嫁了’，请问此处的‘公瑾’指得应该是谁?
【简答题】遥想公瑾当年, , 。
【简答题】Julie' s father to L ondon last month. He there three times· A .went; had gone B. has gone; has been C. went; has been D. has been; had goneA. A .went; had gone B. B. has gone; has been C. C. went; ha...
【简答题】遥想公瑾当年, ( ), ( )。公瑾指 ( )
【单选题】— Where is David? — I think he ____ Australia. [ ]
A.
has gone to
B.
has been
C.
has gone
D.
has been to
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